EP0657198B1 - Single stage fuel filter with seal control air purge - Google Patents

Single stage fuel filter with seal control air purge Download PDF

Info

Publication number
EP0657198B1
EP0657198B1 EP94119525A EP94119525A EP0657198B1 EP 0657198 B1 EP0657198 B1 EP 0657198B1 EP 94119525 A EP94119525 A EP 94119525A EP 94119525 A EP94119525 A EP 94119525A EP 0657198 B1 EP0657198 B1 EP 0657198B1
Authority
EP
European Patent Office
Prior art keywords
conduit
fuel
seal
base
filter cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94119525A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0657198A2 (en
EP0657198A3 (en
Inventor
Leon P. Janik
M. Craig Maxwell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanadyne Automotive Corp
Original Assignee
Stanadyne Automotive Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/166,226 external-priority patent/US5484527A/en
Application filed by Stanadyne Automotive Corp filed Critical Stanadyne Automotive Corp
Publication of EP0657198A2 publication Critical patent/EP0657198A2/en
Publication of EP0657198A3 publication Critical patent/EP0657198A3/en
Application granted granted Critical
Publication of EP0657198B1 publication Critical patent/EP0657198B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/08—Construction of the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/46—Several filtrate discharge conduits each connected to one filter element or group of filter elements

Definitions

  • This invention relates generally to devices for filtering and separating liquids. More particularly, the present invention relates to filters for the fuel supply system or lubricating oil of an internal combustion engine and removing foreign particles and separating water therefrom.
  • filters employ a disposable filter cartridge which is replaced at pre-established intervals of filter usage.
  • the cartridge is secured to a base assembly that is fixedly mounted to the engine header or some other fixed location.
  • air pockets are formed in the fuel filter.
  • the air pockets normally form at the top of the fuel filter. Air bubbles tend to form in the fuel as a result of gassing when exposed to changes in pressure.
  • the air pockets tend to disintegrate over time and/or the stream of bubbles present in the fuel is of a relatively small magnitude.
  • the air pockets generally do not result in the formation of large air bubbles in the fuel supply partly due to the vapor pressure of the pressurized fuel. Consequently, for pressurized systems, air pockets in the fuel filter do not present a significant problem or obstacle to the circulation of fuel through the fuel filter and the delivery of fuel to the engine.
  • EP-A-0547951 discloses a fuel filter cartridge including a housing having axially spaced first and second ends.
  • a first seal is mounted in an axial opening in the first end of the housing.
  • the first seal comprises an elastomeric member defining an axial opening and having an inner surface end an outer surface.
  • a filter element having first and second ends is disposed in the housing and defines a central inner region on one side of the element and an outer region on the opposing side of the element.
  • An endcap is mounted to the filter element second end.
  • a conduit having axially opposite first and second ends is mounted to the endcap such that the conduit is disposed in the filter element inner region.
  • a vent defining a vent orifice, is disposed in the conduit.
  • EP-A-0442365 discloses a fuel filter cartridge including a housing having axially spaced first and second ends.
  • a first seal is mounted in an axial opening in the first end of the housing.
  • the first seal comprises an elastomeric member defining an axial opening end having an inner surface and an outer surface.
  • a filter element having first end second ends is disposed in the housing and defines a central inner region on one side of the element end an outer region on the opposing side of the element.
  • the problem to be solved by the present invention is how to provide an alternative way for controlling the size of the air baffles in the fuel supply.
  • This object is solved by a fuel filter cartridge according to independent claim 1 and a fuel filter assembly according to independent claim 15.
  • the invention in a preferred form is a fuel filter assembly which incorporates a filter cartridge having internal baffles and an internal vent to control air bubble formation and its adverse effects.
  • the invention implements an improved seal to establish a controlled bleed path within the filter cartridge to meter the stream of air bubbles in the fuel supply exiting the filter.
  • the fuel filter is preferably of a type which includes a base which has a fuel inlet and a fuel outlet.
  • a conduit interiorly defines a first axial passage which communicates with the inlet.
  • a second conduit surrounds the first conduit and defines a second axial passage. The second axial passage communicates with the outlet.
  • the filter cartridge which is mountable to the base, preferably includes at least one pleated filter element.
  • the filter cartridge has a central axial bore that is dimensioned to receive the conduits.
  • a sealing grommet mounted at the bore upper opening diametrally fluidically seals against the outer conduit.
  • a first conduit disposed in the filter cartridge bore extends upward from a medial plate.
  • the first conduit upper end defines a flange which receives the lower portion of the first sealing grommet.
  • the inside surface of the flange seals against an outer circumferential ridge of the first sealing grommet.
  • a second sealing grommet mounted adjacent the first conduit upper end diametrally seals against the inner base conduit.
  • Fluted baffles angularly disposed on the first cartridge conduit outer surface are in fluid communication with the second base outlet conduit adjacent the first sealing grommet.
  • a vent orifice opens radially through the first cartridge conduit adjacent the second sealing grommet.
  • the orifice is dimensioned and located to limit and control the rate of escape and the size of air bubbles.
  • the baffles define a flow path which tends to separate air bubbles from the fuel and thereby form an upper bubble collection zone within the cartridge since the bubbles tend to resist traversing downwardly around the baffles.
  • a fuel filter assembly in accordance with the present invention is generally designated by the numeral 10.
  • the filter assembly 10 is adapted for incorporation into the fuel supply system or lubricating oil system of an internal combustion engine (not illustrated), such as a diesel engine, for removing particulate matter from the fuel or oil and for separating water from the fuel or oil.
  • the fuel filter assembly 10 is particularly adapted for incorporation into a fuel supply system which is operated under a vacuum.
  • Filter assembly 10 comprises a base assembly 20 and a disposable filter cartridge 50.
  • the base assembly 20 is fixedly mounted to the engine header or other fixed location of the vehicle.
  • Filter cartridge 50 is secured to the base assembly 20 by means of a retainer collar 100.
  • the base assembly 20 and the disposable cartridge 50 may assume a wide variety of configurations.
  • the base is an inverted cup-like receptacle which forms a skirt defining a lower receiving cavity for upper portions of a disposable cartridge.
  • An elongated sleeve-like conduit 24 and an outer concentric sleeve-like conduit 26 having an axial end 28 provide generally coaxial fluid communication between the base and the disposable cartridge.
  • an inlet connector 30 at an upper side location of the base connects with the fuel line (not illustrated) to ultimately provide fluid communication through the interior passageway defined by the first conduit 24.
  • An outlet connector 32 at an upper side location of the base connects with the fuel line to provide external fluid communication from the axial fluid conduit defined between the first and second conduits 24 and 26.
  • An integral projecting bracket 34 which may include a pair of openings 36 for anchoring the filter base to the engine header extends transversely from the base, as shown in Figure 1.
  • the base may not employ the described bracket structure but instead include a pair of fastener openings for receiving mounting fasteners.
  • the base may also have an external air vent 38.
  • the base assembly 20 defines an interior cavity 22.
  • a plug 44 may be disposed in the base assembly 20 such that shoulder 45 and an axially projecting column 46 of the plug occupy a substantial portion of the cavity 22 and the first conduit 24, respectively.
  • the plug column 46 may extend the entire length of the conduit 24 and project slightly beyond the lower terminus thereof.
  • the plug 44 may be composed of plastic or other suitable material and may have a solid or hollow core. As explained in U.S. Patent No. 5,312,546, assigned to the assignee of the present invention and the disclosure of which is incorporated herein by reference, the plug occupies a pre-established cartridge volume. When the filter cartridge 50 is axially dismounted from the base, the fuel cartridge 50 essentially gains free volume. The free volume gain allows for the fuel cartridge 50 to capture any fuel which may drain from the base.
  • the disposable filter cartridge 50 comprises a can-like enclosure formed by a pair of opposed lower and upper cup-like sections 52, 54. The sections are joined along a circumferential roll seam 56.
  • the upper section 52 which is smaller in diameter than the lower section, is received by the base receptacle.
  • the upper section 52 is dimensioned to be closely accommodated in the base receptacle.
  • a central axial opening 58 in the upper section is dimensioned to receive the conduits 24 and 26.
  • a sealing grommet 60 mounted at the opening 58 diametrally fluidically seals against the outer conduit 26.
  • the inside surface 62 of the grommet 60 has a shallow circumferential groove 64 defining a pair of circumferential ridge-like seal surfaces 66.
  • the outside surface 68 of the grommet 60 has a circumferential ridge 70 on the lower portion 72 of the grommet 60.
  • the cartridge may employ a dual stage filter assembly or a single stage assembly as illustrated in Figures 1 and 2.
  • a filter element 74 which has a continuous fan-shaped pleated configuration is mounted in the enclosure. The lower end of the element 74 is engaged by a medial plate 76 having a central opening 78.
  • a tubular conduit 80 extends upward from the medial plate 76.
  • the tubular conduit upper end 82 defines a throat of enlarged diameter which receives the lower portion 72 of the grommet 60.
  • the inside surface 84 of the conduit upper end 82 seals against the outer circumferential ridge 70 of the grommet 60.
  • the second conduit 26 is received by the first sealing grommet 60 when the filter cartridge 50 is axially installed.
  • the outer surface of the second conduit 26 is engaged by the seal surfaces 66 of the first sealing grommet 60, sealing the second conduit 26 and the filter cartridge 50.
  • the axial force developed by the engagement of the second conduit 26 and the first sealing grommet 60 causes the outside circumferential ridge 70 of the first sealing grommet 60 to more firmly engage the inside surface 84 of the conduit upper end 82.
  • a second sealing grommet 86 extends from the inside surface of the tubular conduit 80 intermediate the upper end 82 and the medial plate 76, as shown in Figure 2.
  • the second sealing grommet 86 is integrally molded with the tubular conduit 80 and is composed of thermoplastic.
  • the second sealing grommet 86 may be composed of an elastomeric material and mounted inside the tubular conduit 80 intermediate the upper end 82 and the medal plate 76.
  • the second sealing grommet 86 diametrally seals against the first conduit 24.
  • At least one axially extending fluted baffle 88 is integrally disposed on the tubular conduit 80 outer surface.
  • the fluted baffle 88 is in fluid communication with the upper portion of the tubular conduit 80 via a first opening 89 positioned adjacent the first grommet 60.
  • the baffles each have an opening 90 at their lower ends and function as axial fluid passageways which ultimately communicate with the outlet conduit 26 of the base.
  • three angularly spaced fluted baffles 88, 88' and 88'' are employed.
  • the fluted baffles 88 define a flow path which tends to separate the air bubbles from the fuel flowing through the filter.
  • the bubbles resist traversal around the lower end of the baffles through the openings 90. Consequently, a bubble collection zone is created and continuously maintained at the upper portion of the cartridge on the clean side of the filter.
  • the baffles 88 thus function as barriers to the bubble flow from the filter cartridge.
  • vent orifice 92 opens radially through the tubular conduit 80 intermediate the second sealing grommet 86 and the baffle first opening 89.
  • the orifice 92 is dimensioned and located to limit the size of air bubbles and to meter the flow of collected air bubbles to the upper end of conduit 80 and to the outlet conduit 26. Additional vent orifices may be axially spaced from the first vent orifice 92 to function as metering orifices if orifice 92 becomes plugged.
  • the diameters of the orifices 92 in one embodiment are each approximately 0.015 inches.
  • the base may include a pair of integral outwardly projecting diametrically opposed ramps 40 and 42, as shown in Figure 1.
  • the ramps ascend in spiral-like fashion around the base.
  • the upper ends of the ramps are beveled.
  • the collar includes a pair of diametrically disposed spiral followers 102 and 104 which integrally extend inwardly from the collar.
  • the followers 102, 104 are dimensioned and positioned for engagement with the ramps 40, 42 so that the followers slidably engage and ascend the ramps upon alignment and angular rotation of the collar.
  • the foregoing ramp and spring configuration may be substantially identical to that disclosed in co-pending U.S. Patent Application Serial No.
  • the collar 100 includes an inwardly projecting annular shoulder 106 which engages the roll seam 56 of the cartridge for releasably locking the cartridge to the base.
  • the fuel enters the fuel filter assembly 10 through the fuel inlet passage and exits the filter through the outlet passage.
  • the general flow path of the fuel through the filter assembly is generally designated by the Figure 1 arrows. It will be appreciated that the fuel flow path initially axially traverses through the interior of the inner conduit 24.
  • the circulation path extends generally axially upwardly and generally radially through the filter element 74 with the return flow path through the fluted baffles 88 and traversing between the inner conduit 24 and the outer conduit 26.
  • the orifice 92 functions as a bleed vent to control the formation of air bubbles in the fuel flow path particularly as the level of the fuel in the filter changes, such as may, for example, result from vehicle movement or cartridge attitude shifts.
  • a vacuum head draws fuel upwardly through the return passageway between conduits 24 and 26. If the level of fuel descends to a position which at least partially uncovers orifice 92, such as illustrated in Figure 6, air will bleed in a controlled fashion through the orifice 92 into the filtered fuel traversing the return passageway.
  • the intermittent stream of air bubbles B will have no or a negligible effect on the delivery of fuel since the bubbles B will be relatively small in size.
  • the orifice 92 functions to meter the flow of tiny bubbles above the fuel level by providing the air bleed to the return passage.
  • the baffles function as barriers to limit the flow of bubbles to the outlet stream from the clean side of the filter element and to cause the bubbles to collect and be essentially stored at the interior top portion of the cartridge on the clean side of the filter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP94119525A 1993-12-13 1994-12-09 Single stage fuel filter with seal control air purge Expired - Lifetime EP0657198B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US166226 1993-12-13
US08/166,226 US5484527A (en) 1993-12-13 1993-12-13 Module for filter assembly base
US08/316,508 US5489384A (en) 1993-12-13 1994-09-30 Single stage fuel filter with seal control air purge
US316508 1994-09-30

Publications (3)

Publication Number Publication Date
EP0657198A2 EP0657198A2 (en) 1995-06-14
EP0657198A3 EP0657198A3 (en) 1995-08-02
EP0657198B1 true EP0657198B1 (en) 1997-09-03

Family

ID=26862083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119525A Expired - Lifetime EP0657198B1 (en) 1993-12-13 1994-12-09 Single stage fuel filter with seal control air purge

Country Status (4)

Country Link
EP (1) EP0657198B1 (ja)
JP (1) JP3596685B2 (ja)
DE (1) DE69405358T2 (ja)
ES (1) ES2107108T3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10688430B2 (en) 2013-01-14 2020-06-23 Cummins Filtration Ip, Inc. Cleanable filter

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519352C2 (de) * 1995-05-26 1997-08-07 Mann & Hummel Filter Filteranordnung
GB2329850A (en) * 1997-10-03 1999-04-07 Lucas Ind Plc Liquid filter with slot shaped air vent
US6364121B1 (en) * 1999-07-19 2002-04-02 Stanadyne Corporation Filter cartridge with grommet spring
US6328883B1 (en) * 2000-05-31 2001-12-11 Parker-Hannifin Corporation Fuel filter assembly with priming pump
FR2883198B1 (fr) * 2005-03-15 2008-01-25 Filtrauto Sa Systeme de filtration de liquide avec rechauffage
FR2937564B1 (fr) * 2008-10-28 2011-04-15 Filtrauto Filtre a carburant avec dispositif de purge et cartouche filtrante pour un tel filtre
EP2218998B1 (en) * 2009-02-03 2012-12-19 Ipsen, Inc. A sealing mechanism for a vacuum heat treating furnace
ITRE20090087A1 (it) * 2009-09-08 2011-03-09 Ufi Filters Spa Dispositivo per la riduzione delle dimensioni delle bolle d aria nel gasolio di alimentazione di motori
WO2011102934A1 (en) 2010-01-22 2011-08-25 Donaldson Company, Inc. Pulse jet air cleaner systems; evacution valve arrangements; air cleaner components; and, methods
CN114470925B (zh) * 2022-01-26 2023-10-24 孙倩 纺织制造用环境自清洁尾料处理回收设备及系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035797A (en) * 1990-02-14 1991-07-30 Stanadyne Automotive Corp. Key system for filter assembly
FR2684894B1 (fr) * 1991-12-16 1994-03-18 Labinal Precision Mecanique Filtre a gazole.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10688430B2 (en) 2013-01-14 2020-06-23 Cummins Filtration Ip, Inc. Cleanable filter

Also Published As

Publication number Publication date
JP3596685B2 (ja) 2004-12-02
ES2107108T3 (es) 1997-11-16
EP0657198A2 (en) 1995-06-14
EP0657198A3 (en) 1995-08-02
DE69405358T2 (de) 1998-01-08
DE69405358D1 (de) 1997-10-09
JPH07259682A (ja) 1995-10-09

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